Alaska Ocean Acidification Network tribal working group

While most people don’t know much about ocean acidification, it has become a major concern of Alaska fishing communities. Higher rates of CO2 means the ocean is 30 percent more acidic than it was three centuries ago, and that has impacted everything from how shellfish build their shells to causing harmful algal blooms that result in paralytic shellfish poisoning and other issues.

The tribal working group was formed to coordinate ocean acidification research and monitoring activities, as well as local community outreach activities, between tribal organizations across Alaska. So far discussions have been on creating consistency in data collection, and expanding data collection to sites in the Arctic that are not currently adequately sampled. This effort is about expanding tribal capacity for research and monitoring, and having tribes take the lead in some areas in Alaska which are under sampled by university and agency researchers, as well as partnering with those researchers to build local capacity.

In addition to Sitka Tribe of Alaska (STA), other members of the AOAN tribal working group include Alutiiq Pride Shellfish Hatchery in Seward, Sun’aq Tribe of Kodiak, the Native Village of Kotzebue, and Yakutat Tlingít Tribe. SEATOR includes 16 Southeast tribal partners, plus Sun’aq Tribe in Kodiak, with its lab located in Sitka. The Sitka Sound Science Center recently posted an online survey about ocean acidification for the AOAN.

“Over the past few years the Sitka Tribe of Alaska (STA) has become a leader in Alaska in monitoring for shellfish toxicity for communities,” said Davin Holen, who is coordinating the tribal working group for AOAN. “This includes working closely with communities throughout Southeast Alaska to monitor stocks important for subsistence harvests. This effort has lead to the establishment of the Southeast Alaska Tribal Ocean Research (SEATOR), which is housed in the environmental department of STA. Recently the STA lab installed equipment to monitor for ocean acidification. STA worked collaboratively with the Alutiiq Pride Shellfish Hatchery in Seward to set up monitoring protocols for ocean acidification. Using their existing SEATOR network for testing shellfish, STA is beginning to monitor ocean acidification levels throughout Southeast Alaska. Additional monitoring will occur in collaboration with the Sun’aq Tribe of Kodiak for Kodiak Archipelago communities, along with two sites under development in the Arctic. Tribal monitoring of environmental conditions in Southeast Alaska by STA through the SEATOR network has become a model for other areas of Alaska, making STA a vital partner for marine science in Alaska.”

The Sitka Tribe of Alaska continuously monitors the carbonate chemistry of Sitka Harbor and is beginning a discrete sample collection program modeled after the Alutiiq Pride Shellfish Hatchery’s existing program. The Sitka Tribe coordinates discrete sample collection and analysis with the SEATOR partnership’s existing weekly phytoplankton and shellfish biotoxin monitoring programs, including with the Hoonah Indian Association and other Southeast Alaska tribal partners.

Kennedy said SEATOR’s participation in the Alaska Ocean Acidification Network tribal working group is a natural extension of its shellfish testing work.

“We installed a Burke-o-Lator (BoL) in early June, which is an instrument that can continuously monitor the chemistry of water pumped through it and can measure individual preserved water samples,” Kennedy said. “While we’re still working to fully calibrate the individual water sample analysis portion of the instrument, we have started shipping kits of bottles and preservative to our partners. Since our partners are already collecting a phytoplankton sample every week and shellfish samples every two weeks, our goal is for partners to add OA-sample collection to their phytoplankton sampling routine and to ship us preserved samples with their clams every two weeks. Ocean acidification’s specific effects on nearshore ecosystems are still not well known, so we’re hoping that by pairing OA samples with phytoplankton assemblages and shellfish toxins, we’ll get a clearer picture of each community’s vulnerability. We are also interested in seeing whether the chemistry in our OA samples helps us to predict phytoplankton toxins, as work in California has suggested that domoic acid production is higher in more acidic waters.”

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